Intro Organic Help

How alkenes and alkynes differ from alkanes
http://www.youtube.com/watch?v=7XbYhjyUI-M&feature=youtube
alkenes and alkynes
http://www.youtube.com/watch?v=Rf7wGtdWsEE&feature=youtube_gdata_player
benzene rings and alkenes
http://www.youtube.com/watch?v=gxgl5iG3R2o&feature=youtube_gdata_player
cis and trans isomers
http://www.youtube.com/watch?v=ZUtBy4KfMFg&feature=youtube_gdata_player
Benzene and other aromatics
http://www.youtube.com/watch?v=A5r7wkwDID4&feature=youtube_gdata_player
Naming Aromatics
http://www.youtube.com/watch?v=3Hko9dpGkeQ&feature=youtube_gdata_player
Aromatics
http://www.youtube.com/watch?v=8gW7H0ReN5g&feature=youtube_gdata_player